I'm uploading a picture of the patch, but since this forum has zero editing/preview capabilities (not to mention email subscription/notification…), I have no idea if or where that picture will show up in this post.

Anyhooooo…

Bang the foobar message & watch the print output. All good.

Start the metro and watch the print output. Again, good.

Bang the foobar message a few times, and see the nice foobars interspersed w/ the metro output. Still good.